I remapped the "Select All" command on my computer from CMD - A to CMD - E. In order to make the change for all apps, MacOS allows changing the shortcut in: Keyboard > Keyboard Shortcuts > App Shortcuts > All Applications (or by adding application specific shortcut changes.) I added an entry for "Select All" as CMD - E, which works for all my applications except for Firefox. Firefox even recognizes that the shortcut was modified, but still defaults to CMD - A as the default. What can I do to fix this?